Currently HttpProxyMiddleware uses the standard linux http_proxy environment variable.
The problem with that is that it means I have to set a proxy on the entire server to set a proxy on scrapy.
This is a major inconvenience as scraping is obviously a task that requires more proxies than most other activities.
I want to change HttpProxyMiddleware to use an HTTP_PROXY setting instead of (or in adition to) the env var.
What do you think about it? is it a positive change you would accept and want to see added?